pixelfaucet/examples/text.cr

require "../src/game"

class TextGame < PF::Game
  def initialize(*args, **kwargs)
    super
    @x = 0.0
    @y = 0.0
    @dx = 50.0
    @dy = 50.0
    @msg = "Hello, World!"
    # @msg = "HI"
    @color = PF::Pixel.random
  end

  def update(dt, event)
    @x += @dx * dt
    @y += @dy * dt

    if @x < 0
      @x = 0
      @dx = -@dx
      @color = PF::Pixel.random
    end

    if @x > @width - (@msg.size * PF::Sprite::CHAR_WIDTH)
      @x = @width - (@msg.size * PF::Sprite::CHAR_WIDTH)
      @dx = -@dx
      @color = PF::Pixel.random
    end

    if @y < 0
      @y = 0
      @dy = -@dy
      @color = PF::Pixel.random
    end

    if @y > @height - (PF::Sprite::CHAR_HEIGHT)
      @y = @height - (PF::Sprite::CHAR_HEIGHT)
      @dy = -@dy
      @color = PF::Pixel.random
    end
  end

  def draw
    clear(0, 0, 50)
    draw_string(@msg, @x.to_i, @y.to_i, @color)
  end
end

engine = TextGame.new(160, 100, 4).run!